Ontario, Calif. — The International Association of Plumbing and Mechanical Officials (IAPMO®) and the American Society of Plumbing Engineers (ASPE) have co-published White Paper 2-2024: Capacities of Stacks and Horizontal Drains in Storm Drainage Systems.
The sizing for storm drainage systems is dependent upon flow capacity equations used to calculate velocities and flow rates in pipe conduits. One of the variables in the equations is the coefficient of roughness. This white paper explores how the roughness of different types of material will change the computational results that are dependent upon the roughness coefficient of the pipe.
“Storm drainage systems play a vital role in building resiliency as they convey water off the roof, said IAPMO Vice President of Technical Services and Research Christoph Lohr, PE. “Studying storm piping systems is important to make sure these systems are not undersized, as the weight of water on a roof could exceed design parameters and fail, which could be catastrophic. With changing weather patterns, particularly rainfall rates increasing in many locations, revisiting assumptions and validating the equations of how storm piping systems are sized is vital. We are thankful to our partners at ASPE for collaborating with us on this white paper, which shows the depth of plumbing expertise exhibited by both organizations and their dedication to public safety.”
The IAPMO/ASPE white paper is available for free download HERE
ABOUT IAPMO
Founded in 1926, the International Association of Plumbing and Mechanical Officials is a global leader in providing uniform codes for the plumbing and mechanical industry. IAPMO protects health and safety, supports sustainability and emerging technology, and delivers code education.
ABOUT ASPE
The American Society of Plumbing Engineers (ASPE) is the international organization for professionals skilled in the design, specification and inspection of plumbing systems. ASPE is dedicated to the advancement of the science of plumbing engineering, to the professional growth and advancement of its members and the health, welfare and safety of the public.
For questions, please contact Christoph Lohr at (909) 731-0219 or christoph.lohr@iapmo.org; or Hugo Aguilar at (909) 472-4111 or hugo.aguilar@iapmo.org.
ASSE International is seeking members to update or create the following product standards: ASSE 1012, ASSE 1023, ASSE 1051, ASSE 1376, and ASSE 1391. Working group members will be assisting the Product Standards Committee (PSC) with the continued development of these existing and prospective American National Standards. (ASSE 1376 and 1391 are new standards.)
ASSE International is seeking working group members to update three professional qualification standards — ASSE 12000 Standard for Water Management and Infection Control Risk Assessment for Building Systems; ASSE 13000 Standard for Service Plumber and Residential Mechanical Service Technician; and ASSE 27000 Standard for Hybrid Fire Extinguishing Systems Personnel.
IAPMO’s Systems Certification Body (SCB) has been accredited by the ANSI National Accreditation Board (ANAB) to provide ISO 45001:2018 certification to existing and prospective clients wishing to demonstrate the effectiveness of their occupational health and safety management system.